### What problem does this PR solve?
fix: remove duplicate MessageItem #1289
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
### What problem does this PR solve?
feat: add description text to operators #918
feat: drag the operator to the canvas and initialize the form data #918
feat: extract the useFetchModelId to logicHooks.ts
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
feat: add CreateFlowModal #918
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
feat: catch errors when sending messages #918
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
feat: add OperateDropdown
feat: send debug message #918
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
feat: Support for conversational streaming
#709
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
Make the app name configurable even after the project is built #730
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
feat: add file icon to table of FileManager #345
fix: modify datasetDescription
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
Support Traditional Chinese
Issue link: #335
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
* feat: select the corresponding parsing method according to the file type
* feat: after the document is successfully uploaded, use the ChunkMethodModal to select the parsing method.
* feat: add pdf types to ParserListMap
* feat: remove ChunkMethodModal from knowledge-file
